22 votes

Burning Arduinos one after another

Measurements to prevent breaking an Arduino (or AVR in general): Precautions Always remove the USB or adapter plug when you make a change in the circuit. Check all wires before you switch it on. ...
Michel Keijzers's user avatar
22 votes
Accepted

Difference between these two NodeMCU boards?

The top one is a real NodeMCU version 1 board (ESP-12E module). The bottom one is a knock-off copy - looks like the same module on it. The biggest difference is the USB interface. The real one uses ...
Majenko's user avatar
  • 105k
20 votes
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Does an Arduino get worn out by too much command execution?

No, the code doesn't "wear out" the MCU. In general no matter what you are doing roughly the same level of activity is being performed. Even delay() does lots of work while it's "idling". There are ...
Majenko's user avatar
  • 105k
16 votes
Accepted

What is the purpose of the I/O pin capacitor on the AVR microcontroller?

To make explicit the implicit parasitic capacitance on the pin.
dannyf's user avatar
  • 2,770
16 votes
Accepted

Burning Arduinos one after another

I thought it has protection against that. Genuine Arduinos do have some protection, yes. Is it normal for them to react like that so easily? Cheap rubbish? Sure. You get what you pay for. How ...
Majenko's user avatar
  • 105k
10 votes

Difference between Arduino.cc and Arduino.org

Please take a look at The Untold History of Arduino.
J Nielsen's user avatar
  • 101
10 votes

When Raspberry Pi is preferred over Arduino

The claim that the Pi is more "powerful" is a bit misleading. What does "powerful" really mean? And is it relevant to making a weather station? I made a temperature and humidity sensor as described ...
Nick Gammon's user avatar
  • 38.2k
8 votes

Difference between Arduino.cc and Arduino.org

Update on the situation: on October 1st, 2016 a blog post at arduino.cc "Two Arduinos become one" announced that an agreement was found between arduino.cc and arduino.org. Two key points: the ...
Pierre H.'s user avatar
  • 181
6 votes

Breadboard for kids

Breadboards are made to work with components of a standard size - a breadboard with larger hole spacing would not be able to fit standard through-hole chips. I have never seen such an item. Having ...
AMADANON Inc.'s user avatar
6 votes

Does an Arduino get worn out by too much command execution?

It's not. Well, it might slowly wear out if you run it like 20 years....(like most other physical products)? At least it does not rely on code complexity but how many writing operation done in the ...
Bumsik Kim's user avatar
6 votes

Does an Arduino get worn out by too much command execution?

For a hobbyist: About the only life limiting software related issue might be writing to the FLASH memory as fast as you can from inside a program. But few programs make use of variables that need to ...
st2000's user avatar
  • 7,343
6 votes

When Raspberry Pi is preferred over Arduino

As opposed to the Arduino boards, the Raspberry Pi is a single-board computer with a quad-core CPU, a GPU, on-board RAM, and many peripherals. The main difference between the Pi and the Arduino (or ...
altai's user avatar
  • 161
6 votes

Esp8266 Vin pin

(Answering in more detail, as this is the top search hit for "ESP8266 Vin", at least for me) TL;DR: Vin is NOT directly connected to USB power. There is a protection diode between USB+/VU and Vin, ...
Jules Kerssemakers's user avatar
5 votes
Accepted

Arduino sending data over MAX485

How would the wiring look like? I was unable to find any dumb-proof tutorial online. I found this tutorial to be pretty usefull. There really isn't much to it, I suggest trying a short range ...
aaa's user avatar
  • 2,695
5 votes
Accepted

Do I need to supply the 12V connection to an HDD

Judging by my old copy of "Upgrading and repairing PCs" - which I found a quote for on Google Books - the 12V supply is for the spindle motor, and it says: Spindle motors, particularly on the ...
Nick Gammon's user avatar
  • 38.2k
5 votes

Does an Arduino get worn out by too much command execution?

... (or generally any other micro-controller) ... The other answers are great, but there is one small exception. Ferroelectric RAM (FRAM) is a form of memory that combines the non-volatility of ...
Ignacio Vazquez-Abrams's user avatar
5 votes
Accepted

What's in an Arduino?

You did not specify what Arduino board you are talking about. It would have been useful to tag the question with the appropriate board name. In the following, I assume you want something similar to an ...
Edgar Bonet's user avatar
  • 43.1k
5 votes

Is there an alternative to soldering to connect boards?

Yes, there are ways. There is a system called "Press Fit" where the pins have a bulge in one end of them. This grips the inside of the holes in place of soldering. A number of companies make them, ...
Majenko's user avatar
  • 105k
4 votes

Can we detect a magnet using Arduino? If so how?

I can't comment yet but you probably are looking for a hall effect sensor. Something like this is a simple version of the sensor. https://www.sparkfun.com/products/9312 You can then do a digitalRead ...
8BitTRex's user avatar
4 votes

Breadboard for kids

or or Maybe use something like Littlebits, which uses magnets, but is kind of expensive.
Gerben's user avatar
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4 votes
Accepted

Breadboard for kids

The problem (probably) isn't only because it's too small, wiring can be hard to understand. I think this might be a solution: It'll cost you some work. But it will get difficult for them to wire it ...
aaa's user avatar
  • 2,695
4 votes

Do I need to supply the 12V connection to an HDD

3.5" hard drives require 12V and 5V for the motor and logic respectively. SATA ones may also require 3.3V for the logic. Most smaller laptop drives (2.5") only require 5V and 3.3V. Some 2.5" drives ...
Majenko's user avatar
  • 105k
4 votes

Burning Arduinos one after another

Always use a series resistor when connecting anything to your IO pins. In many cases you will need one anyway (like driving a LED or a BJT), and in other cases it will not hurt (like driving MOSFET ...
Dmitry Grigoryev's user avatar
4 votes

My Arduino isn't showing up on my computer. What should I do?

Linux Getting Arduino and Arduino-like boards working properly under Linux can be a troublesome task if you are not familiar with how Linux works. So I am going to introduce you to some of the basic ...
4 votes

Why are my motors attached to an Arduino MEGA not running?

As you did not give details I assume the following: You supply the MEGA via USB or external 5-12V power supply the motors are supplied via an extra external 12V power supply with sufficiant amperage ...
Codebreaker007's user avatar
4 votes

pull-up or pull-down

This depends on what you are doing. The IO hardware of the Uno (more specific the Atmega328p, which is the used chip) has internal pullup resistors, that can be used, when the pin is configured as ...
chrisl's user avatar
  • 16.3k
3 votes
Accepted

How to use Aiduino module to connect to computer network?

An Arduino is completely incapable of doing such a difficult task. It's literally impossible because the processor isn't strong enough, it has no built in network capabilities that support NAS, it has ...
Len's user avatar
  • 391
3 votes

Can we detect a magnet using Arduino? If so how?

If you don't care about measuring the strength of the magnetic field, you can use a magnetic switch (sometimes called a reed switch). A magnetic switch closes when a magnet is put up to it and opens ...
Jamie Robbens's user avatar

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